.email-hero { align-items: stretch; }
.email-hero .domain-intro h1 { max-width: 900px; font-size: clamp(3.2rem, 6.4vw, 5.8rem); }
.email-hero { padding-bottom: 72px; }

.email-form {
  grid-column: 1;
  grid-row: 3;
  margin-top: 0;
  padding: 20px;
  background: #fff;
  border: 1px solid #c9d8e5;
  border-radius: var(--radius-lg);
  box-shadow: 0 18px 44px rgba(0, 49, 88, .09);
}

.email-label-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 8px; }
.email-label-row label { color: var(--navy-900); font-size: .76rem; font-weight: 780; }
.email-label-row span { color: var(--muted); font-family: "SFMono-Regular", Consolas, monospace; font-size: .63rem; }

.email-form textarea {
  width: 100%;
  min-height: 250px;
  resize: vertical;
  padding: 15px;
  color: #24384e;
  background: #fbfdff;
  border: 1px solid #b9c9d8;
  border-radius: var(--radius-sm);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: .72rem;
  line-height: 1.55;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.email-form textarea:focus { border-color: var(--blue-600); box-shadow: 0 0 0 3px rgba(1, 169, 244, .14); }
.email-form textarea[aria-invalid="true"] { border-color: var(--red); box-shadow: 0 0 0 3px rgba(216, 92, 92, .1); }
.email-form p { margin: 6px 0 0; color: var(--muted); font-size: .67rem; line-height: 1.45; }
.email-form p a { color: var(--blue-600); font-weight: 700; }
.email-form .form-message { min-height: 1em; color: #a43f3f; font-size: .74rem; font-weight: 650; }

.email-form-actions { display: flex; gap: 8px; margin-top: 14px; }
.email-form-actions button { min-height: 45px; padding: 9px 16px; border-radius: var(--radius-sm); font-size: .76rem; font-weight: 780; cursor: pointer; }
.analyze-button { color: #fff; background: var(--blue-600); border: 1px solid var(--blue-600); }
.analyze-button:hover { background: var(--navy-800); }
.clear-button { color: var(--navy-900); background: #fff; border: 1px solid var(--line); }
.clear-button:hover { border-color: var(--blue-600); }
.instruction-section {
  padding-block: 74px 78px;
  background: #eaf2f8;
  border-block: 1px solid #d7e4ee;
}

.instruction-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 470px);
  align-items: end;
  gap: 32px 60px;
  margin-bottom: 25px;
}

.instruction-heading h2 { margin: 8px 0 0; color: var(--navy-950); font-size: clamp(2.25rem, 4.5vw, 3.7rem); letter-spacing: -.055em; line-height: 1; }
.instruction-heading > p { margin: 0; color: var(--slate); font-size: .86rem; line-height: 1.65; }

.instruction-alert {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 17px;
  align-items: center;
  margin-bottom: 20px;
  padding: 17px 20px;
  color: #d8e9f5;
  background: var(--navy-950);
  border: 1px solid rgba(1, 169, 244, .28);
  border-radius: var(--radius-lg);
}

.instruction-alert > span { color: var(--blue-500); font-family: "SFMono-Regular", Consolas, monospace; font-size: .62rem; font-weight: 800; }
.instruction-alert p { margin: 0; color: #a9bfce; font-size: .73rem; line-height: 1.6; }
.instruction-alert strong { color: #fff; }

.instruction-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.instruction-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 25px;
  background: #fff;
  border: 1px solid #cbdbe7;
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px rgba(0, 36, 74, .055);
}

.instruction-card-head { display: flex; align-items: center; gap: 15px; padding-bottom: 18px; border-bottom: 1px solid var(--line-soft); }
.app-code { width: 48px; height: 48px; display: grid; place-items: center; flex: 0 0 auto; color: var(--blue-600); background: #edf8fd; border: 1px solid #bce5f7; border-radius: 10px; font-family: "SFMono-Regular", Consolas, monospace; font-size: .58rem; font-weight: 800; }
.platform-label { display: block; margin-bottom: 2px; color: var(--muted); font-family: "SFMono-Regular", Consolas, monospace; font-size: .58rem; font-weight: 750; letter-spacing: .06em; text-transform: uppercase; }
.instruction-card h3 { margin: 0; color: var(--navy-950); font-size: 1.08rem; letter-spacing: -.025em; }

.instruction-card ol { display: grid; gap: 14px; margin: 20px 0 22px; padding: 0; list-style: none; }
.instruction-card li { display: grid; grid-template-columns: 25px minmax(0, 1fr); gap: 11px; align-items: start; }
.instruction-card li > span { width: 23px; height: 23px; display: grid; place-items: center; color: var(--blue-600); background: #edf8fd; border-radius: 50%; font-family: "SFMono-Regular", Consolas, monospace; font-size: .61rem; font-weight: 800; }
.instruction-card li p, .outlook-path p { margin: 1px 0 0; color: var(--slate); font-size: .74rem; line-height: 1.62; }
.instruction-card kbd { display: inline-block; padding: 1px 5px; color: #31475c; background: #f1f5f8; border: 1px solid #d4dfe8; border-bottom-width: 2px; border-radius: 4px; font-family: inherit; font-size: .88em; }

.outlook-path { margin-top: 18px; padding: 15px 16px; background: #f5f8fb; border-left: 3px solid var(--blue-500); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.outlook-path + .outlook-path { margin-top: 9px; }
.outlook-path strong { display: block; margin-bottom: 4px; color: var(--navy-900); font-size: .72rem; }

.official-link { width: fit-content; margin-top: auto; padding-top: 4px; color: var(--blue-600); font-size: .68rem; font-weight: 750; text-decoration: none; }
.official-link:hover { text-decoration: underline; }

.instruction-finish { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 20px; padding: 22px 24px; background: #fff; border: 1px solid #cbdbe7; border-radius: var(--radius-lg); }
.instruction-finish strong { color: var(--navy-950); font-size: .88rem; }
.instruction-finish p { margin: 3px 0 0; color: var(--muted); font-size: .7rem; }
.instruction-finish a { min-height: 42px; display: inline-flex; align-items: center; gap: 16px; padding: 9px 14px; color: #fff; background: var(--blue-600); border-radius: var(--radius-sm); font-size: .72rem; font-weight: 780; text-decoration: none; white-space: nowrap; }
.instruction-finish a:hover { background: var(--navy-800); }

.email-page .scope-section { padding-block: 76px 84px; }

.redact-option { display: flex; align-items: center; gap: 8px; width: fit-content; margin: 0 0 16px auto; color: var(--muted); font-size: .68rem; cursor: pointer; }
.redact-option input { width: 15px; height: 15px; accent-color: var(--blue-600); }

.route-list, .email-detail-list { border-top: 1px solid var(--line-soft); }
.route-row { display: grid; grid-template-columns: 55px minmax(0, 1fr) 125px; gap: 18px; padding: 18px 24px; border-bottom: 1px solid var(--line-soft); }
.route-row:last-child { border-bottom: 0; }
.route-number { color: var(--blue-600); font-family: "SFMono-Regular", Consolas, monospace; font-size: .68rem; font-weight: 800; }
.route-path { min-width: 0; }
.route-path strong, .route-path span, .route-path code { display: block; overflow-wrap: anywhere; }
.route-path strong { color: var(--navy-900); font-size: .76rem; }
.route-path span { margin-top: 4px; color: var(--muted); font-size: .66rem; }
.route-path code { margin-top: 7px; color: #40556b; font-size: .62rem; }
.route-time { color: var(--muted); font-family: "SFMono-Regular", Consolas, monospace; font-size: .61rem; line-height: 1.5; text-align: right; }
.route-time span { display: block; }

.email-detail-row { display: grid; grid-template-columns: 145px minmax(0, 1fr); gap: 18px; padding: 14px 24px; border-bottom: 1px solid var(--line-soft); }
.email-detail-row:last-child { border-bottom: 0; }
.email-detail-row strong { color: var(--blue-600); font-family: "SFMono-Regular", Consolas, monospace; font-size: .62rem; letter-spacing: .04em; text-transform: uppercase; }
.email-detail-row code, .email-detail-row span { min-width: 0; overflow-wrap: anywhere; color: #30445b; font-size: .68rem; line-height: 1.5; }

@media (max-width: 820px) {
  .instruction-heading { grid-template-columns: 1fr; gap: 14px; }
  .instruction-grid { grid-template-columns: 1fr; }
  .route-row { grid-template-columns: 45px minmax(0, 1fr); }
  .route-time { grid-column: 2; text-align: left; }
}

@media (max-width: 680px) {
  .email-hero { padding-bottom: 52px; }
  .email-form { padding: 15px; }
  .email-form textarea { min-height: 230px; }
  .email-form-actions { flex-direction: column; }
  .instruction-section { padding-block: 54px 58px; }
  .instruction-alert { grid-template-columns: 1fr; gap: 5px; }
  .instruction-card { padding: 20px; }
  .instruction-finish { align-items: stretch; flex-direction: column; padding: 20px; }
  .instruction-finish a { justify-content: space-between; }
  .email-page .scope-section { padding-block: 58px 64px; }
  .redact-option { margin-left: 0; }
  .route-row { padding-inline: 20px; }
  .email-detail-row { grid-template-columns: 1fr; gap: 6px; padding-inline: 20px; }
}